APA (7th ed.) Citation

Rudkin, D. M., & Tripp, R. P. (1989). The type species of the Ordovician trilobite genus Isotelus I. gigas Dekay, 1824. Royal Ontario Museum.

Chicago Style (17th ed.) Citation

Rudkin, David M., and Ronald P. Tripp. The Type Species of the Ordovician Trilobite Genus Isotelus I. Gigas Dekay, 1824. Toronto: Royal Ontario Museum, 1989.

MLA (8th ed.) Citation

Rudkin, David M., and Ronald P. Tripp. The Type Species of the Ordovician Trilobite Genus Isotelus I. Gigas Dekay, 1824. Royal Ontario Museum, 1989.